What does increasing the voltage do to the current in a circuit, assuming resistance remains constant?

What does increasing the voltage do to the current in a circuit, assuming resistance remains constant?

• A. It decreases the current
• B. It increases the current
• C. It has no effect on the current
• D. It reverses the current direction

Answer: (B)

Increasing the voltage in a circuit while keeping the resistance constant leads to an increase in current, according to Ohm's Law, which is expressed as \( I = \frac{V}{R} \). In this equation, \( I \) represents current, \( V \) represents voltage, and \( R \) represents resistance. When voltage is increased, the numerator of the equation rises while the resistance stays the same, resulting in a larger value for current. Therefore, as voltage increases, the flow of electric charge (current) also increases proportionally. This principle is crucial in electrical circuits as it governs how electrical components respond to changes in voltage, allowing for proper circuit design and functionality in HVACR systems and other applications. Understanding this relationship is fundamental for HVACR technicians, as managing voltage levels is essential for efficient operation and safety in heating, ventilation, air conditioning, and refrigeration systems.

Increasing the voltage in a circuit while keeping the resistance constant leads to an increase in current, according to Ohm's Law, which is expressed as ( I = \frac{V}{R} ). In this equation, ( I ) represents current, ( V ) represents voltage, and ( R ) represents resistance.

When voltage is increased, the numerator of the equation rises while the resistance stays the same, resulting in a larger value for current. Therefore, as voltage increases, the flow of electric charge (current) also increases proportionally. This principle is crucial in electrical circuits as it governs how electrical components respond to changes in voltage, allowing for proper circuit design and functionality in HVACR systems and other applications.

Understanding this relationship is fundamental for HVACR technicians, as managing voltage levels is essential for efficient operation and safety in heating, ventilation, air conditioning, and refrigeration systems.